1775 - the Continental Army, forerunner of the United States Army, was created.

1777 - Congress adopts the Stars and Stripes.

1777 - the Second Continental Congress approved the design of the original American flag.

1822 – Charles Babbage announced his invention

1846 - a group of U.S. settlers in Sonoma proclaimed the Republic of California....

1900 – Hawaii turned into the United States

1919 - John Alcock and Arthur Whitten Brown embarked on the first non-stop flight across the Atlantic..

1967 - China tests First Hydrogen Bomb.